A new implementation of the geometric method for solving the Eady slice equations
A new implementation of the geometric method for solving the Eady slice equations
复制标题
求解Eady切片方程的几何方法的新实现
DOI:
10.1016/j.jcp.2022.111542
复制
发表时间:
2022
影响因子:
4.1
通讯作者:
Egan C
中科院分区:
文献类型:
--
作者:
Egan C
We present a new implementation of the geometric method of Cullen & Purser (1984) for solving the semi-geostrophic Eady slice equations, which model large scale atmospheric flows and frontogenesis. The geometric method is a Lagrangian discretisation, where the PDE is approximated by a particle system. An important property of the discretisation is that it is energy conserving. We restate the geometric method in the language of semi-discrete optimal transport theory and exploit this to develop a fast implementation that combines the latest results from numerical optimal transport theory with a novel adaptive time-stepping scheme. Our results enable a controlled comparison between the Eady-Boussinesq vertical slice equations and their semi-geostrophic approximation. We provide further evidence that weak solutions of the Eady-Boussinesq vertical slice equations converge to weak solutions of the semi-geostrophic Eady slice equations as the Rossby number tends to zero.
登录
查看更多内容
DOI:
--
发表时间:
2013
期刊:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
Y. Brenier
通讯作者:
Y. Brenier
DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
R. T. Williams
通讯作者:
R. T. Williams
DOI:
10.1137/21m1422756
发表时间:
2021
期刊:
SIAM J. Math. Anal.
影响因子:
--
作者:
T. Gallouët;Q. Mérigot;A. Natale
通讯作者:
A. Natale
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
L. Ambrosio;Maria Colombo;G. Philippis;A. Figalli
通讯作者:
A. Figalli
影响因子:
2
作者:
J. Pedlosky
通讯作者:
J. Pedlosky